diff --git a/build-constraints.yaml b/build-constraints.yaml
index 01eeade9..9f5d5b14 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -9030,6 +9030,8 @@ expected-test-failures:
 
     # Please review the sections above before adding packages to a new section or to Misc.
 
+    - heist # https://github.com/commercialhaskell/stackage/issues/6765
+
 # end of expected-test-failures